I've been having a spam problem and was advised that I may need to delete my spam filter databases and start over. I searched this forum for instructions on this, but wasn't able to find anything. I'm sure this is probably easy to do, but I find that Zimbra is tempermental (like why won't the logger components run for the last 2 days?) and I don't want to seriously mess it up.

What are the steps I need to take get properly delete the spam database(s)? Should I empty them or blow them away completely? How do they get recreated?